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1SICOPDatasheet 2010
s
Low Voltage Control Components
Answers for industry.
2Index
Contents Page No.
3TH30 Contactor Relays 3
3TF Power Contactors 7
3TF Contactors for Hoisting Duty 25
3TK5 AC1 Duty Contactors 29
3UA and 3UC Bimetal Overload Relays 33
3VU13 and 3VU16 Motor Protection Circuit Breakers 45
3TW and 3TE Starters 55
3Contactor Relays 3TH30
Reliability and safety are pre-requisites in the choice of the control contactor. Siemens 3TH30 contactor
relays satisfy these criteria and thus offer the right choice to the customer.
Applications
3TH30 are used in control circuits for switching and signalingpurpose. Also they are used for interfacing with the electroniccircuits.
Standards
Contactor relay conforms to IS /IEC 60947-5-1.
They also carry CE mark.
Range
Air break contactor relays are suitable for 10A, (AC15/AC14 rating)at 240V AC and 10A, (DC13 rating) at 24V DC.
Benefits and features
Flexibility
Choice of auxiliary contacts
3TH30 contactor relays comes with 4 contacts as a basic unit(4NO, 3NO+1NC, 2NO+2NC). However the contacts can beextended upto 8 contacts by adding maximum 4 auxiliarycontact blocks to this basic unit. This offers flexibly in selectionand configuration.
Choice of mounting
3TH30 can be mounted on 35mm DIN rail and they are alsosuitable for screw mounting.
Long Life
Superior design of current carrying parts, contact system and themagnet system increases the reliability which also results intohigher electrical and mechanical endurance.
High reliability
Double Break Parallel Bridge contact mechanism
This mechanism is available with 3TH30. Such contactmechanism ensures reliable contact at low voltage and lowcurrents (5mA at 17V DC). It also offers unmatched reliabilityas well as capability to integrate directly into PLC orinstrumentation circuits.
Double Break Parallel BridgeAuxilary Contacts
User friendliness and safety
Positively driven contacts
3TH30 auxiliary contactors satisfy the conditions for positivelydriven operation between NO and NC contacts. NO and NCcontact do not close at the same time. This is extremelyimportant when they are used in safety circuits of criticalapplications. This ensures operator safety even duringabnormal condition.
SIGUT Termination
Figure touch proof terminals
It protects against accidental contact with live parts whichensures operator safety.
Funnel shaped cable entries
Reduce wiring time by facilitating quick location of theconnecting wire.
Cable end-stop
It decides the insertion depth of the connecting wires. Sincethe insertion depth is predetermined, insulation of the cablecan be cut accordingly and the possibility of insulationgetting inadvertently caught under the terminal is avoided.
Captive Screws
This feature prevents the screws from falling down therebyfacilitates the wiring. Hence, the auxiliary contactors aredelivered with untightened terminals. This eliminates theoperation of untightening terminals before wiring.
Lug less termination
This feature helps in reducing the termination time.
4Selection and ordering data
Contacts in basic unit MLFB - With AC coil MLFB - With DC coil Std. pkg. (nos.)
4NO 3TH30 40-0A.. 3TH30 40-0B..
3NO+1NC 3TH30 31-0A.. 3TH30 31-0B.. 1
2NO+2NC 3TH30 22-0A.. 3TH30 22-0B..
.. Please add coil voltage code
AC Coil voltages
Coil voltage 24 42 110 230 415
Code B0 D0 F0 P0 R0
DC Coil voltages
Coil voltage 24 42 48 110 220 250
Code B4 D4 W4 F4 M4 N4
(Other coil voltages are also available.)
Technical data
Type 3TH30 3TX40..
Standards IS/IEC 60947-5-1
Rated Operational Voltage 690V
Rated Impulse withstand voltage 8kV
Permissible ambient temp. Storage -50 to +80CService -25 to +55C
Mechanical endurance cycles 30 mill 10 mill
Rated operating current Ie/AC12 16A 10A
Rated operating current Ie/AC15/AC14 at operating voltage230V 10A 5.6A415V 4A 3.6A690V 2A 1.8A
Rated operating current Ie/DC13 at operating voltage Current paths in series Current paths in series
1 2 3 1 2 3
24V 10 A 10A 10A 10 A 10A 10A110V 0.9 A 2.5A 10A 0.8 A 3.8A 10A220V 0.45A 0.75A 2A 0.2 A 0.85A 2A440V 0.2 A 0.5A 0.9A 0.11A 0.2A 0.5A
Coil Voltage tolerance 0.8 to 1.1 x Ue
Rated coil inputAC operated, 50Hz Closing VA/p.f. 68 / 0.82
When closed VA/P.f. 10 / 0.29DC operated Closing=when closed W 6.2
Frequency of operation at AC15/DC13 duty cycles/hr 3600
Short circuit protectionHRC fuse-links 16A 16AMiniature circuit breakers, (C-char.) 16A 10A
Degree of protection IP 20
For 3TH30
Operating time at 1.0*Us AC DC
Closing Closing Delay NO 10-25 ms 30-70ms
Opening Delay NC 7-20ms 28-56 ms
Opening Opening Delay NO 5-18ms 10-20 ms
Closing Delay NC 7-20ms 15-25 ms
5Accessories and ordering data
1. Surge suppressor
It is used to reduce the effect of switching overvoltages createdduring the opening of inductive circuits. Typically they aremounted outside the body of the contactor relay, and areconnected in parallel with the coil terminals. Varioustechniques for the suppression of switching overvoltages canbe employed. For example: RC element, Varistor etc
Surge Suppressor (Varistor)
Coil voltageMLFB
Std. pkg.
AC DC (nos.)
24 - 48 V 24 - 70 V 3TX7 402-3GY1
48 - 127 V 70 - 150 V 3TX7 402-3HY1
127 - 240 V 150 - 250 V 3TX7 402-3JY1 10
240 - 400 V 3TX7 402-3KY1
400 - 460 V 3TX7 402-3LY1
Surge Suppressor (RC Element)
Coil voltageMLFB
Std. pkg.
AC DC (nos.)
24 - 48 V 24 - 70 V 3TX7 402-3RY2
48 - 127 V 70 - 150 V 3TX7 402-3SY2
127 - 240 V 150 - 250 V 3TX7 402-3TY2 10
240 - 400 V 3TX7 402-3UY2
400 - 460 V 3TX7 402-3VY2
Dimensional drawings
3TH30 - 0A 3TH30 - 0B
c Auxiliary Contact Blockd Identification tag
Varistor
RC element
2. Add on blocks
Auxiliary Contact Block Type Reference Std. pkg. (nos.)
1NO 3TX40 10 2A
1NC 3TX40 01 2A10
1NO extended 3TX40 10 4A
1NC extended 3TX40 01 4A
Extended contacts (NO/NC) is early make NO and late break NCcombination.
Useful technical informationVariety of connections for DC applications
6
7Power Contactors 3TF
For more than 110 years, Siemens has been developing and manufacturing industrial control products.
We offer a wide product range which fulfills the demands of our customers regarding performance and
reliability. Our aim is to make industrial operation easier ensuring flexible mounting, modular
construction and high functionality. With 3TF contactors Siemens has been offering a tried tested
trusted solution to control, switch and protect your motors upto 250kW.
Applications
3TF power contactors are suitable for switching and controllingsquirrel cage and slip-ring motors as well as other AC loads, suchas solenoids, capacitors, lighting loads, heating loads andtransformer loads.
Standards
Contactors conform to IS/IEC 60947-4-1. They also carry the CEmark.
Coordinated feeder
Contactors and bi-relays have been tested for type-2 coordinationat Iq = 50kA, 415V AC, 50Hz as per IS/IEC 60947-4-1, for both fuseprotected as well as fuseless motor feeders.
Range
Air break contactors are available from 9 A to 475A in 3 poleversion.
Also available in 2 pole AC version from 45A to 400A.
Benefits and features
Flexibility
Choice of Auxiliary contacts
Contactor Aux. contacts on Permissible add-onbasic unit contact blocks
9A / 12A 1 NO Upto 4NO or 4NC
9A / 12A 1 NC Upto 4NO or 2NC
16A/22A - Upto 4NO or 4NC
32A/38A - Upto 4NO or 4NC
45A to 475A 2NO+2NC 2 x (1NO+1NC)
The customer can order desired number of contacts therebyreducing the cost.
Choice of mounting
Contactor can be mounted on 35mm DIN and they are alsosuitable for screw mounting (9-38A DIN / Screw mountingand 45-475A Screw mounting).
Choice of coil voltages
AC 50Hz coil code: 3TF30 to 3TF56
Coil voltage (V) 24 42 110 230 415
Code B0 D0 F0 P0 R0
Wide band AC 50 Hz coil code: 3TF30 to 3TF35
Coil voltage (V) 70-140 150-280 260-460
Code W110 W220 W415
AC 50/60 Hz coil code: 3TF57
Coil voltage (V) 110-132 220-240 380-460
Code F7 M7 Q7
DC coil code: 3TF30 to 3TF57
Coil voltage (V) 24 42 48 110 220 250+
Code B4 D4 W4 F4 M4 N4
+ For 3TF3 only
(Other coil voltages are also available.)
8High performance
No duration upto 55CContactors are suitable for operation in service temperatureupto 55C without derating. This avoids selection of higherrated contactor, thereby reducing cost.
Long LifeSuperior design of current carrying parts, contact system andthe magnet system increases the reliability results into higherelectrical and mechanical endurance.
High short-time ratingContactors have a high short-time rating, which makes themsuitable for applications having high starting currents and longrun-up times.
High reliability
High insulation voltage and impulse withstand voltage capacityensures reliable performance during occasional abnormalincrease in supply voltage.
Double break parallel bridge contact mechanismThis mechanism is available for auxiliary contacts. Such contactmechanism ensures reliable contact at low voltage and lowcurrents (5mA at 17VDC). It also offers unmatched reliability.(Chances of 2 mal-operations in 100 mill. operations as against4460 for single bridge contacts)
Double Break Parallel BridgeAuxilary Contacts
Positively driven contacts3TF contactors satisfy the conditions for positively drivenoperation between the main power contacts and the NCcontacts. NC contacts positively open before the main contactcloses. This is extremely important when power contactors areused in safety circuits of critical applications.
SIGUT Termination
Figure touch proof terminals*It protects against accidental contact with live parts whichensures operator safety.
Funnel shaped cable entriesReduce wiring time by facilitating quick location of theconnecting wire.
Cable end-stopIt decides the insertion depth of the connecting wires. Sincethe insertion depth is predetermined, insulation of the cablecan be cut accordingly and the possibility of insulationgetting inadvertently caught under the terminal, is avoided.
Captive ScrewsThis feature prevents the screws from falling down therebyfacilitates the wiring. Hence, the contactors are deliveredwith untightened terminals. This eliminates the operation ofuntightening terminals before wiring.
Lug less terminationThis feature helps in reducing the termination time.
* Finger touch proof terminals are available upto 85 A
User friendliness and safety
Arc Chamber Interlock (45A and above)It prevents the contactor from switching ON, if the arc chamberis not fitted properly. Thus avoids accidents to plant andpersonnel.
9Selection and ordering data
Contactor Rated current (A) Motor kW Auxiliary AC 50 Hz coil DC coil Std.size Ie AC3 at at 415V 50Hz, 3ph contacts Type Type pkg.
415V, 50Hz, 3ph Pl. fill in coil voltage code Pl. fill in coil voltage code (nos.)
0 9 4 1NO $ 3TF30 10-0A.. 3TF30 10-0B..1NC $ 3TF30 01-0A.. 3TF30 01-0B..
12 5.5 1NO $ 3TF31 10-0A.. 3TF31 10-0B..1NC $ 3TF31 01-0A.. 3TF31 01-0B..
1 16 7.5 $ 3TF32 00-0A.. 3TF32 00-0B..
22 11 $ 3TF33 00-0A.. 3TF33 00-0B..
2 32 15 $ 3TF34 00-0A.. 3TF34 00-0B..
38 18.5 $ 3TF35 00-0A.. 3TF35 00-0B..
3 45 22 2NO + 2NC $ 3TF46 02-0A..ZA01@ 3TF46 02-0D..ZA01@
63 30 2NO + 2NC $ 3TF47 02-0A..ZA01@ 3TF47 02-0D..ZA01@
70 37 2NO + 2NC $ 3TF47 72-0A.. 3TF47 72-0D.. 1
4 75 42 2NO + 2NC $ 3TF48 22-0A..ZA01@ 3TF48 22-0D..ZA01@
85 45 2NO + 2NC $ 3TF49 22-0A..ZA01@ 3TF49 22-0D..ZA01@
6 110 55 2NO + 2NC $ 3TF50 02-0A.. 3TF50 02-0D..
140 75 2NO + 2NC $ 3TF51 02-0A.. 3TF51 02-0D..
8 170 90 2NO + 2NC $ 3TF52 02-0A.. 3TF52 02-0D..
205 110 2NO + 2NC $ 3TF53 02-0A.. 3TF53 02-0D..
10 250 132 2NO + 2NC $ 3TF54 02-0A.. 3TF54 02-0D..1)
300 160 2NO + 2NC $ 3TF55 02-0A.. 3TF55 02-0D..1)
12 400 200 2NO + 2NC $ 3TF56 02-0A.. 3TF56 02-0D..1)
475 250 2NO + 2NC $ 3TF57 02-0C.. 3TF57 02-0D..1)
1) Please connect DC coil circuit as recommended on page 16$ For more auxiliary contacts please refer table below - auxiliary contact blocks@ For box type (SIGUT) terminal, order 2 nos. 3TX7 460-0E
Auxiliary contact blocks
For Contactor Description Type Std. pkg. (nos.)
3TF30 to 35 1NO 3TX4 010-2A1NC 3TX4 001-2A
101NO ext 3TX4 010-4A1NC ext 3TX4 001-4A
3TF46 to 57 Second 1NO+1NC Left 3TY7 561-1K1
Second 1NO+1NC Right 3TY7 561-1L
2 Pole AC contactors - 3TFFor single phase and 2 phase applications with AC coils
Contactor Size Rated current Ie (A) Type2) Std. pkg.AC3, 415V (nos.)
3 45 3TF46 02-0A..ZB01
3 63 3TF47 02-0A..ZB01
3 70 3TF47 72-0A..ZB01
6 110 3TF50 02-0A..ZB01
6 140 3TF51 02-0A..ZB01 1
8 170 3TF52 02-0A..ZB01
8 205 3TF53 02-0A..ZB01
10 250 3TF54 02-0A..ZB01
10 300 3TF55 02-0A..ZB01
12 400 3TF56 02-0A..ZB01
Coil voltage code AC 50Hz: 3TF30 to 3TF56
Coil voltage 24 42 110 230 415
Code B0 D0 F0 P0 R0
Coil voltage code AC 50/60 Hz: 3TF57
Coil voltage (V) 110-132 220-240 380-460
Code F7 M7 Q7
Coil voltage code DC: 3TF30 to 3TF57
Coil voltage (V) 24 42 48 110 220 250+
Code B4 D4 W4 F4 M4 N4
+ For 3TF3 only
2) Coil voltage code AC 50Hz: 3TF (2 Pole AC Contactor)
Coil voltage 110 230 415
Code F0 P0 R0
(Other coil voltages are also available)
10
Technical data
1) As per IS/IEC 60947-12) Ratings at 1000V AC - upon enquiry.
ontime x 1003) On-load factor (ED) in % = cycle time
Max. switching freq. z = 50 per hour. Ratings at higher frequency upon enquiry.
Contactor Size 0 1 2
Type 3TF30 3TF31 3TF32 3TF33 3TF34 3TF35
Permissible ambient temperature Storage C -55 to +80Service C -25 to +55
Maximum operating voltage V 690
Rated insulation voltage Ui (At Pollution Degree 3)1) V 690
Rated impulse strength Uimp kV 8
Mechanical endurance AC Cycles 15 x 106 10 x 106
(make/break operations) DC Cycles 15 x 106 10 x 106
Rating of contactors for AC loads
AC-1 duty, switching resistive load
Rated operational current Ie at 40C upto 690V A 21 32 65at 55C upto 690V A 20 30 55
Ratings of three-phase loadsp.f.=1 at 55C at 415V kW 13 19.7 36
500V kW 17 26 47.5690V kW 22 34. 62.7
AC-2 and AC-3 duty
Rated operational current Ie2) upto 415V A 9 12 16 22 32 38500V A 9 12 16 17 32 38690V A 6.6 8.8 12.2 12.2 27 27.
Nominal rating of slipring or squirrel-cage at 415V kW 4 5.5 7.5 11 15 18.5motors at 50/60 Hz. 500V kW 5.5 7.5 10 11 21 25
690V kW 5.5 7.5 11 11 23 23.
AC-4 duty (contact endurance approx.2x105 make-break operations at Ia=6Ie)
Rated operational current Ie upto 690V A 3.3 4.3 7.7 8.5 15.6 18.5
Rating of squirrel-cage motors at 50/60Hz. at 415V kW 1.54 2.1 3.5 4 8.2 9.8500V kW 1.7 2.5 4.6 5.2 9.8 11.8
Max. permitted rated operational current Ie/AC-4= Ie/AC-3 upto 500V. Ref. life curve for the life. 690V kW 2.54 3.45 6 6.6 13 15.5
Used as stator contactor (upto 690V)(AC-2 duty)
Stator currents Ies 20% A 20 20 25(46*) 85
On-load factor (ED)3) with intermittent duty 40% A 20 20 25(37*) 67
60% A 20 20 25(33*) 60
* Applicable up to 500V 80% A 20 20 25(30*) 55
Used as rotor contactor (upto 690V)(AC-2 duty)
Rotor current Ier 20% A 31 73 125
On-load factor (ED)3) 40% A 31 58 106
with intermittent duty 60% A 31 52 95
80% A 31 47 87
Locked rotor voltage Uer Starting V 1320 1320 1320
Plugging / Control V 660 660 660
AC-6b duty, switching low-inductanceindividual three-phase capacitors 415V kVAR 4 7.5 16.7at 50/60Hz4) 500V kVAR 4 7.5 16.7(we also offer special capacitor duty contactors) 690V kVAR 4 7.5 16.7
Thermal loading 10 s current A 90 96 130 176 400 400
Power loss per current path at Ie/AC-3 W 0.6 1.1 1 1.6 2 2.5
Rating of contactors for DC loads
DC-1 duty, switching resistive load (L/R < 1mS)
Rated operational current Ie (at 55C)
Number of current paths in series connection 1 2 3 1 2 3 1 2 3
at 24V A 20 20 20 30 30 30 55 55 55110V A 2.1 12 20 4.5 30 30 6 55 55220V A 0.8 1.6 20 1 5 30 1 6 45440V A 0.6 0.8 1.3 0.4 1 2.9 0.4 1.1 2.9
DC-3 and DC-5 duty, shunt & series motors (L/R < 15mS)
Rated operational current Ie (at 55C)
Number of current paths in series connection 1 2 3 1 2 3 1 2 3
at 24V A 20 20 20 20 30 30 20 55 55110V A 0.15 0.35 20 0.75 7 30 0.75 7 55220V A - - 1.75 0.2 1 3.5 0.2 1 3.5440V A - - 0.2 0.09 0.27 0.6 0.1 0.27 0.6
11
4) Ratings for capacitor - banks in parallel - upon enquiry. Minimum inductance of 6Hrequired between parallel connected capacitors.
3 4 6 8 10 12
3TF46 3TF47 3TF47 7 3TF48 3TF49 3TF50 3TF51 3TF52 3TF53 3TF54 3TF55 3TF56 3TF57
-55 to +80-25 to +55
1000 1000
1000 1000
8 8
10 x 106 10 x 106
3 x 106 3 x 106
90 100 100 120 120 170 230 240 325 325 425 60080 90 90 100 100 160 210 220 300 300 400 550
52 52 52 66 66 105 132 138 195 195 262 38167 67 67 86 86 138 173 181 260 260 345 47691 91 91 114 114 183 228 240 340 340 457 657
45 63 70 75 85 110 140 170 205 250 300 400 47545 63 70 75 85 110 140 170 205 250 300 400 47545 63 70 75 75 110 110 170 170 250 250 400 400
22 30 37 42 45 55 75 90 110 132 160 200 25030 41.4 46 50.7 59 76.3 98 118 145 178 210 284 32940 57.2 60.1 70 70 105 105 163 163 245 245 392 392
24 28 31 34 42 54 68 75 96 110 125 150 150
13.1 15.3 16.9 18.6 23 29.5 38 42 54 63 72 88 8815.8 18.4 20.4 22.4 27 35.5 46 50 65 76 86 107 107
21.8 25.4 28.2 30.9 38 49 63 69 90 105 119 147 147
123 138 138 154 246 323 339 462 617 800
98 110 110 122 195 256 268 367 490 670
87 98 98 109 174 229 240 327 436 600
80 90 90 100 160 210 220 300 400 550
150 219 219 243 389 510 535 729 972 1336
150 174 174 193 309 405 425 579 772 1061
138 155 155 172 275 361 378 516 688 946
126 142 142 158 253 332 348 474 632 869
1500 1500 1500 2000 2000 2000 2000 2000 2000 2000
750 750 750 1000 1000 1000 1000 1000 1000 1000
30 50 60 100 150 20035 62.5 80 130 190 26530 50 60 100 150 200
360 500 500 800 800 880 1140 1360 1640 2500 2500 3400 4200
3.5 6 6 7.5 10 10 14 14 20 16 23 40 40
1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3
80 80 80 100 100 100 160 160 160 200 200 200 300 300 300 400 400 4006 80 80 12 100 100 18 160 160 18 200 200 33 300 300 33 400 4001.2 7 80 2.5 13 100 3.4 20 160 3.4 20 200 3.8 300 300 3.8 400 4000.48 1.2 3 0.8 2.4 6 0.8 3.2 11.5 0.8 3.2 11.5 0.9 4 11 0.9 4 11
1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3
5 80 80 6 100 100 160 160 160 200 200 200 300 300 300 400 400 4000.75 12.5 80 1.25 100 100 2.5 160 160 2.5 200 200 3 300 300 3 400 4000.2 1.1 3.5 0.35 1.75 4 0.6 2.5 160 0.6 2.5 200 0.6 2.5 300 0.6 2.5 4000.1 0.27 0.6 0.15 0.42 0.8 0.17 0.65 1.4 0.17 0.65 1.4 0.18 0.65 1.4 0.18 0.65 1.4
12
Power Contactors Technical Data
5) With AC coil. With DC coil: 1000 oprs/hr.6) Including switching contactor.
7) Rated value of the control voltage.
Contactor Size 0 1 2 3
Type 3TF30 3TF31 3TF32 3TF33 3TF34 3TF35 3TF46 3TF47 3TF47 7
Switching frequency z(Contactors without overload relay) Operation
No load AC Cycles/hr 10,000 10,000 5000 5000 5000 5000 5000 5000 5000DC Cycles/hr 1,500 1,500 1,500 1,500 1,500 1,500 1,000 1,000 1,000
at AC-1 Cycles/hr 2,000 2,000 1,500 1,500 1,200 1,200 1,000 1,000 1,000at AC-2 Cycles/hr 1,000 1,000 750 750 750 600 600 400 400at AC-3 Cycles/hr 1,000 1,000 750 750 750 600 12005) 1000 1000at AC-4 Cycles/hr 250 250 250 250 250 200 400 300 300
Coil ratings Supply frequency Hz 50 50 50 50(cold coil 1.0 x Us)
AC operation 50Hz Closing VA 68 68 101 183p.f. 0.79 0.82 0.83 0.6
Closed VA 10 10 12.1 17p.f. 0.29 0.29 0.28 0.29
DC operation Closing W 6.2 6.2 11.7 400Closed W 6.2 6.2 11.7 2.1
Coil voltage tolerance OperationAC/DC 0.8 to 1.1 x Us 0.8 to 1.1 x Us
at 24V DC 0.8 to 1.2 x Us
Operating times at 1 x Us 8)
AC operation Closing ms 10-25 10 - 25 13 - 32 17 - 30Opening ms 4-18 5 - 20 5 - 10 5 - 25
DC operation Closing ms 30-70 40 - 80 58 -107 22 - 40Opening ms 12-20 10 - 20 13 - 17 105 - 115
Auxiliary contacts
Rated thermal current Ith =
rated operational current Ie / AC-12 A 10 10
Rated operational current Ie / AC-15/AC-14at rated operational voltage Ue upto 125V A 10 10
220V A 10 6415V A 5.5 3.6500V A 4 2.5
Rated operational current Ie / DC12at rated operational voltage Ue upto 48V A 10 10
110V A 2.1 3.2220V A 0.8 0.9440V A 0.6 0.33
Rated operational current Ie / DC13at rated operational voltage Ue upto 24V A 10 10
48V A 5 5110V A 0.9 1.14220V A 0.45 0.48440V A 0.25 0.13
Conductor cross-sections
Main conductor
Solid mm2 2 x (0.5 to 1, 1 to 2.5), 1x4 2 x (2.5 to 6) 1 to 16 2 x (6 to 16)Finely stranded with end sleeve mm2 2 x (0.75 to 2.5) 2 x (1.5 to 4) 1 x (5 to 16, 2.5 to 10) 1 x (10 to 35), 2 x (10 to 25)Pin end connector mm2 1 x (1 to 2.5) 1 x (1 to 6) 2 x (1 to 6) Solid or stranded AWG 2 x (18 to 12) 2 x (14 to 10) 2 x (14 to 6) 2 x (10 to 1/10)Tightening torque Nm 0.8 to 1.4 1 to 1.5 2.5 to 3.0 4 to 6Finely stranded with cable lug mm2 10 to 35Terminal bar (max. width) mm 12Solid or stranded AWG 7 to 1/0Tightening torque Nm 4 to 6
Auxiliary conductor
Solid mm2 2 x (0.5 to 1, 1 to 2.5), 1 x 4 2 x (0.5 to 1, 1 to 2.5), 1 Finely stranded with end sleeve mm2 2 x (0.75 to 2.5) 2 x (0.75 to 2.5) Pin end connector mm2 1 x (1 to 2.5) 1 x (1 to 2.5) Solid or stranded AWG 2 x (18 to 12) 2 x (18 to 12) Tightening torque Nm 0.8 to 1.4 0.8 to 1.4
Short-circuit protection
Main circuit (Fuse type 3NA3) Co-ordinationType - 1 A 35 35 63 63 80 80 160 160 160Type - 2 A 25 25 32 32 80 80 125 125 160
Auxiliary circuits A 16A 6, if overload relay auxiliary contacts are in the contactor coil circuit
13
8) The opening time delay increases when the contactor coil is protected against voltagepeaks. (e.g. Varistor: +2 to +5ms)
4 6 8 10 12
3TF48 3TF49 3TF50 3TF51 3TF52 3TF53 3TF54 3TF55 3TF56 3TF57
5000 5000 5000 5000 5000 5000 3000 3000 3000 20001,000 1,000 1000 1000 1000 1000 1000 1000 1000 1000
900 900 800 800 800 750 800 750 700 500400 350 400 300 300 250 300 250 200 170
1000 850 1000 750 700 500 700 500 500 420300 300 300 200 200 130 200 130 150 150
50 50 50 50 50 50/60Lower7) Upper7)
330 550 910 1430 2450 1136 19000.5 0.45 0.38 0.34 0.21 1 1
32 39 58 84 115 16 450.23 0.24 0.26 0.24 0.33 0.34 0.16
420 500 8766) 12166) 13066) 11106)
2.7 2.7 116) 13.36) 146) 246)
0.8 to 1.1 x Us
22 - 35 22 - 37 25 - 50 25 - 40 25 - 40 48 - 705 - 30 8 - 30 10 - 30 10 - 30 8 - 30 80 - 100
32 - 40 28 - 32 32 - 45 36 - 45 40 - 55 44 - 6095 -105 185 - 195 10 - 20 10 - 20 10 - 20 12 - 15
10 10 10
10 10 106 6 63.6 3.6 3.62.5 2.5 2.5
10 10 103.2 3.2 3.20.9 0.9 0.90.33 0.33 0.33
10 10 105 5 51.14 1.14 1.140.48 0.48 0.480.13 0.13 0.13
16 to 70 35 to 95 35 to 95 50 to 240 50 to 240 50 to 240 50 to 240 50 to 240 15 20 20 25 25 25 25 30
3 to 2/0 6 to 8 10 to 14 10 to 14 14 to 24 14 to 24 14 to 24 14 to 24 14 to 24
2 x (0.5 to 1, 1 to 2.5), 1 x 4 2 x (0.5 to 1, 1 to 2.5) 2 x (0.5 to 1, 1 to 2.5) 2 x (0.75 to 2.5) 2 x (0.75 to 2.5) 2 x (0.75 to 2.5) 1 x (1 to 2.5) 1 x (1 to 2.5) 1 x (1 to 2.5) 2 x (18 to 12) 2 x (18 to 12) 2 x (18 to 12) 0.8 to 1.4 0.8 to 1.4 0.8 to 1.4
250 250 400 400 400 400 500 500 800 800160 160 200 250 250 250 400 400 500 500
14
3TF30 to 3TF49 contactors
3TF50 to 3TF57 contactors
Electrical Life Curves
15
Forward / Reverse starter (Electrical Interlocking)
S0 = OFF Push buttonS1 = ON Push buttonK1 = Line contactorK2 = Star contactorK3 = Delta contactorK4 = Star delta timer (7PU60 20)F2 = Overload relayF1 = Backup fuseF3 = Control circuit fuse
S0 = OFF Push buttonS1 = ON Push buttonS = Maintained command
switchK1 = Main contactorF1 = Main circuit fuseF2 = Overload relayF3 = Control circuit fuse
S0 : 'OFF' Push buttonS1 : 'ON Clockwise' Push buttonS2 : 'ON Anti-clockwise' Push buttonS : Selector Switch 'Clockwise - OFF - Anti-clockwise'
Main circuitPush button control(momentary command) Selector switch control
(command needs to be maintained)K1 : Clockwise contactorK2 : Anti-clockwise contactor
F1 : Main circuit fusesF2 : Overload relayF3 : Control circuit fuse
Main circuit Control circuit for push button control(momentary command)
a) Main circuit b) Control circuit formomentary-contact control
c) Control circuit formaintained-contact control
Direct On Line starter
Star Delta starter
Typical Circuit Diagrams
16
a) Main Circuit
b) Auxiliary circuit for momentary-contact control
K1 : Sizes 3 to 6,3TF46 to 3TF51
K1 : Sizes 8 to 123TF52 to 3TF56
K2 : 3TF30 10 OB.. for 3TF52-553TF32 00-OB.. for 3TF56
K1 : Size 123TF57
K2 : 3TC44 17 4A..
The control circuits indicated by dotted lines are to be wired by customer.
S0 = OFF Push buttonS1 = ON Push buttonK1 = Star contactorK2 = Transformer contactorK3 = Main contactorK5 = Contactor relay
(2NO + 2NC)K4 = Time relay (7PU6020)F1 = Main circuit fusesF2 = Overload relayF3 = Control circuit fuse
Auto Transformer starter
Internal connection diagram for DC coil circuits
Please refer page no. 70 for selection of switchgear for autotransformer starting method
17
Size 0, 3TF30/31AC and DC Coil
Add-on contact block for 3TF30/31/32/33
Size 3 to 12, 3TF46 to 3TF57AC Coil
Size 3 to 12, 3TF46 to 3TF56DC Coil
Size 12, 3TF57DC Coil
Permissible Mounting Position
Size 2, 3TF32/33/34/35AC and DC Coil
Terminal Designation
3TF30 to 3TF33 - AC operation 3TF34/35 - DC operation3TF30 to 3TF33 - DC operation3TF34 to 3TF57 - AC operation3TF46 to 3TF57 - DC operation
18
Accessories and ordering data
1. Mechanical interlocking kitMechanical interlock is required when the supply from twodifferent sources is available. Also the same is required for theapplication involving reversing of motor. Here two contactorsare mechanically interlocked with the help of mechanicalinterlock kit. This ensures closing of only one contactor at atime. Thus prevents a short circuit upon load changeover fromone contactor to another.
For Contactor MLFB Std. pkg.
AC3 Rating Contactor (nos.)
9 to 38A 3TF30 to 35 3TX4 091-1A # 10
45/63/70A 3TF46/47/47-7 3TX7 466-1YA0 2
75/85A 3TF48/49 3TX7 486-1YA0 2
110/140A 3TF50/51 3TX7 506-1YA0 2
170/205A 3TF52/53 3TX7 526-1YA0 2
250/300A 3TF54/55 3TX7 546-1YA0 2
400 A 3TF56 3TX7 566-1YA0 2
110/170 A 3TF50/52 3TX7 526-1YA09 1
170/250 A 3TF52/54 3TX7 546-1YA09 1
#: W/O base plate (not required)
RC element
Varistor
The effective increase in the capacitance ofthe coil circuit reduces the amplitude and rateof rise of switch off overvoltage spikes to suchan extend that no rapid restriking occur.
Varistor limit the maximum value of theovervoltage because they become highlyconductive above a threshold value. Until thisthreshold value is reached shower dischargeoccurs for small duration.
Selection table:
Surge suppressor (Varistor) for 3TF30-3TF35
Coil VoltageType Std. pkg.
AC DC (nos.)
24 - 48 V 24 - 70V 3TX7 402-3GY1
48 - 127V 70 - 150V 3TX7 402-3HY1
127 - 240V 150 - 250V 3TX7 402-3JY1 10
240 - 400V 3TX7 402-3KY1
400 - 600V 3TX7 402-3LY1
Surge suppressor (Varistor) for 3TF46-56
Coil VoltageType Std. pkg.
AC DC (nos.)
Less than 48V 24 - 70V 3TX7 462-3GY1
48 - 127V 70 - 150V 3TX7 462-3HY1
127 - 240V 150 - 250V 3TX7 462-3JY1 10
240 - 400V 3TX7 462-3KY1
400 - 600V 3TX7 462-3LY1
Surge suppressor (RC Element) for 3TF30-3TF35
Coil VoltageType Std. pkg.
AC DC (nos.)
24 - 48V 24 - 70V 3TX7 402-3RY2
48 - 127V 70 - 150V 3TX7 402-3SY2
127 - 240V 150 - 250 V 3TX7 402-3TY2 10
240 - 400V 3TX7 402-3UY2
400 - 460V 3TX7 402-3VY2
RC Element:
3. ConnectorThe 3TS90 connector is used to mount the motor protectioncircuit breaker 3VU on the contactor 3TF with screw terminals.It enables mechanical and electrical connection betweencontactor and motor protection circuit breaker.
Varistor:
2. Surge suppressorIt is used to reduce the effect of switching overvoltages createdduring the opening of inductive circuits. Typically they aremounted outside the body of the contactor, and are connectedin parallel with the coil terminals. Various techniques for thesuppression of switching overvoltages can be employed. Forexample: RC element, Varistor etc.
Range:
Size MPCB Contactor
Std.of
CurrentAC3 MLFB of pkg.
connector MLFBRating
MLFB Current Connector (nos.)Rating
I 3VU13 0.16 to 3TF30 / 31 9 / 12 A 3TS90 01-8K 120A
II 3VU13 6 to 25A 3TF32 / 33 16 / 22A 3TS90 02-8K 1
Benefits:
Direct mounting of 3VU MPCB on 3TF contactor eliminates theneed of power wiring and ensures secure connection. In addition,the assembly time and size of the feeder is reduced which resultsin cost saving. The overall assembly also looks contemporary.
19
Spares and ordering data
Add on Contact Blocks:
For Add on contact blocks Type Std. pkg.Contactor (nos.)
3TF30-35 1NO 3TX40 10-2A1NC 3TX40 01-2A 101NO ext 3TX40 10-4A1NC ext 3TX40 01-4A
3TF46-57 1NO+1NC Left 3TY7 561-1A1NO+1NC Right 3TY7 561-1B 11NO + 1NC (Extd) Right 3TY7 561-1E
3TF46-57 Second 1NO+1NC Left 3TY7 561-1K1Second 1NO+1NC Right 3TY7 561-1L
3TF46/47/477 Special block for DC Coil Circuit 3TY7 461-1F 1
3TF48 to 57 Special block for DC Coil Circuit 3TY7 481-1F 1
2. Main contact kits / arc chambers / AC-DC coils
For contactor type Main contact kits Arc chambers AC coils1) DC coils1) Std. pkg.(AC3 rating) (6 fixed & 3 moving contacts) (nos.)
3TF30 (9A)
3TF31 (12A) 3TY7 403-0A.. 3TY4 803-0B..
3TF32 (16A) 3TY7 420-0A
3TF33 (22A) 3TY7 430-0A
3TF34 (32A) 3TY7 340-0C 3TY7 342-0C3TY7 443-0A.. 3TY7 443-0B..
3TF35 (38A) 3TY7 350-0C 3TY7 352-0C
3TF46 (45A) 3TY7 460-0YA 3TY7 462-0YA
3TF47 (63A) 3TY7 470-0YA 3TY7 472-0YA 3TY7 463-0A.. 3TY7 463-0D..
3TF477 (70A) 3TY7 477-0YA 3TY7 477-0YD
3TF48 (75A) 3TY7 480-0A 3TY7 482-0A3TY7 483-0A.. 3TY7 483-0D..
1
3TF49 (85A) 3TY7 490-0A 3TY7 492-0A
3TF50 (110A) 3TY7 500-0YA 3TY7 502-0YA3TY7 503-0A.. 3TY7 503-0D..
3TF51 (140A) 3TY7 510-0YA 3TY7 512-0YA
3TF52 (170A) 3TY7 520-0YA 3TY7 522-0YA3TY7 523-0A.. 3TY7 523-0D..
3TF53 (205A) 3TY7 530-0YA 3TY7 532-0YA
3TF54 (250A) 3TY7 540-0YA 3TY7 542-0YA3TY7 543-0A.. 3TY7 543-0D..
3TF55 (300A) 3TY7 550-0YA 3TY7 552-0YA
3TF56 (400A) 3TY7 560-0YA 3TY7 562-0YA 3TY7 563-0A.. 3TY7 563-0D..
3TF57 (475A) 3TY7 570-0YA 3TY7 572-0YA 3TY7 573-0C 3TY7 573-0D..
1) Please fill in coil voltage code from table below
1. Auxiliary Contact Blocks
In-built contact configuration
Coil voltage code AC 50Hz: 3TF30 to 3TF56
Coil voltage 24 42 110 230 415
Code B0 D0 F0 P0 R0
Coil voltage code AC 50/60 Hz: 3TF57
Coil voltage (V) 110-132 220-240 380-460
Code F7 M7 Q7
Coil voltage code DC: 3TF30 to 3TF57
Coil voltage (V) 24 42 48 110 220 250+
Code B4 D4 W4 F4 M4 N4
+ For 3TF3 only
(Other coil voltages are also available)
20
Dimensional drawing
3TF30/31 AC Coil 3TF30/31 DC Coil
3TF32/33 AC Coil 3TF32/33 DC Coil
3TF34/35 AC Coil 3TF34/35 DC Coil
Auxiliary contact block Identification tag
Auxiliary contact block Identification tag
Notes
1) Dimensions for coil terminals
2) Dimensions for mounting terminals
Minimum clearance from insulated components = 5mm
Minimum clearance from earthed components = 10mm
3) size of power terminals
4) Size of auxiliary terminals
3TF30 to 3TF32, with mechanical interlock kit
Type a (AC coil) a (DC coil) b1 b2 c
3TF30/31 116 148 90 100 78
3TF32/33 127 159 91 101 85
21
3TF48 and 3TF49
Notes
1) Minimum clearance from insulated components = 3mmMinimum clearance from earthed components = 10mm
2) Dimension with second auxiliary contact block on both sides
3) Dimension for coil terminal.
4) Dimension for mounting.
5) Dimension for power terminal.
6) 3TF53 The conductor bars protrude over the contactor edges on top andbottom by 2mm each.
3TF46 and 3TF47
3TF52 and 3TF53
3TF47 7
3TF50 and 3TF51
3TF54/55
Type a1 a2 b c d3TF52 20 42 174 154 6.6(M6)
3TF53 25 48 184 159 9(M8)
Type a1 a2 b c d3TF50 15 37 149 134 6.6(M6)
3TF51 20 42 159 139 9(M8)
Type a1 c
3TF48 8 107
3TF49 10.5 116
22
Notes
1) Minimum clearance from insulated components = 3mmMinimum clearance from earthed components = 10mm
2) Dimension with second auxiliary contact block on both sides
3) Dimension for coil terminal.
4) Dimension for mounting.
5) Dimension for power terminal.
3TF56/57
Type a b c d
3TF56 25 200 178 48
3TF57 30 209.5 182 52
3TF46/47/477/48/49with Mechanical Interlock Kit
3TF50 to 3TF57with Mechanical Interlock Kit
For a1
a2
b1
b2
c1
c2
d1
e g1
Contactor
3TF50/51 300 240 210 185 160 18 147 260 9 (M8)
3TF52/53 330 270 240 215 203 18 162 315 9 (M8)
3TF54/55 350 290 265 240 219 21 172 375 11 (M10)
3TF56/57 380 310 265 240 243 21 187 385 11 (M10)
For Contactor a1
a2
b1
b2
c1
c2
d1
e g1
3TF46/47/477 240 180 165 145 141 18 117 150 7 (M6)
3TF48/49 260 200 175 155 158 18 127 160 7 (M6)
3TF50 and 3TF52 with Mechanical Interlock Kit3TF52 and 3TF54 with Mechanical Interlock Kit
Type a1 a2 b1 b2 c1 c2 d1 g1
3TF52 & 50 330 270 240 215 203 18 154.5 11
3TF54 & 52 350 290 265 240 219 21 167 11
23
Useful information
Categories of duty - as per IEC 947 / IS 13947
Current Utilisation Typical ApplicationCategories
AC AC1 Non-inductive or slightly inductive loads, resistance furnancesAC2 Slipring motors; starting, switching offAC3 Squirrel-cage motors; starting, switching off motors during running(1)
AC4 Squirrel-cage motors; starting, plugging, inchingAC5a Switching of electric discharge lamp controlsAC5b Switching of incandescent lampsAC6a Switching of transformersAC6b Switching of capacitor banksAC7a Slightly inductive loads in household appliances and similar applicationsAC7b Motorloads for household applicationsAC8a Hermetic refrigerant compressor motor(2) control with manual resetting of overload releasesAC8b Hermetic refrigerant compressor motor(2) control with automatic resetting of overload releases
DC DC1 Non-inductive or slightly inductive loads, resistance furnacesDC3 Shunt-motors: starting, plugging, inching, dynamic braking of d.c motorsDC5 Series-motors: starting, plugging, inching, dynamic braking of d.c motorsDC6 Switching of incandescent lamps
(1) AC3 category may be used for occasional inching (jogging) or plugging for limited time periods such as machine set-up; during such limited time periods thenumber of such operations should not exceed five per minute or more than ten in a 10-min period.
(2) Hermetic refrigent compressor motor is a combination consisting of a compressor and a motor, both of which are enclosed in the same housing, with noexternal shaft or shaft seals, the motor operating in the refrigent
(3) Selection of contactors for utilisation categories from AC-5a to AC-8b and DC6 upon enquiry.
Contact life calculation:
Contactors have bounce free operation. Electrical life is influencedby the breaking currents. For normal AC3 duty the breakingcurrent is the rated operational current and for AC4 duty, thetypical breaking current is 6 times the rated operational current. Incase of mixed duty, the expected life is determined as under
Where
X = expected life for mixed duty
A = expected life for normal AC3 duty
B = expected life for 100% AC4 duty
C = proportion of inching operations as a percentage of totaloperations.
Recommended selection of contactors for hoisting duty (upto 85A)
In hoisting operation, slipring motors are generally used. For this typical hoisting duty, we recommend the contactors listed in the followingtable.
Contactor Stator Protection Rotor Protection Max rotorType Maximum load current with hoisting motor. Maximum load current with hoisting motor(Delta circuit). standstill
For intermittent duty S3 For intermittent duty S3 voltage
25% 40% 60% 100% 25% 40% 60% 100%
A A A A A A A A V
3TF31 10 10 9 8 15 14 13 12 660
3TF33 17 16 15 13 25 24 22 20 660
3TF45 28 25 23 20 42 38 35 30 660
3TF47 49 45 40 30 73 68 60 45 750
3TF49 68 62 54 45 100 95 80 68 1000
24
Recommended substitutes for discontinued 3TA/3UA19
For standard application (AC3 duty)
AC3 ratingSize
Discontinued DiscontinuedSize Contactor Bi-relay
Motor kW 415V,415V, 50Hz contactor bi-relay 50Hz, 3ph.
7.8A3TA673TA76 3TF30
3.8
9A 0 3UA5000 4
12A 1 3TA21 3UA1911 3TF31 5.5
16A1
3TF323UA5200
7.5
22A 3TA11 3TF33 11
30A 3TA223TF34
15
32A 23TA13 3UA1928
2 3UA5500# 18.5
38A 3TF35 20
45A 3TF46-Z3UA5800-Z1
22
63A4
3TA241) 3 3TF47-Z 30
70A 3TF47-7 3UA5800-Z2 37
105A 3TA163UA1938
4 3TF48/49 3UA5800-Z1 45
110A6
3TF50 3UA5830 55
140A8
3TA28-Y 3TF51 75
170A8
3TF52 95
200A 3TA28 3UA66 3TF533UA6230
110
250A10
3TF54 132
300A 12 3TB56 3UA66 3TF55 160
400A12
3TF56 220
475A 3TF57 3UA6830 250
# use 3UA50 + 3UX1418 to replace 3UA19 28 (upto 12A) use 3UA52 + 3UX1420 to replace 3UA19 28 (upto 25A)1) For crane/hoisting/inching application, replace 3TA24 with 3TF48/49 contactors
For crane application (AC2 duty, S3 100% inching)
Discontinued contactor New contactor
Size Type 3TA Size Type 3TF
1 3TA21/11 1 3TF33
2 3TA22/13 2 3TF35
4 3TA24 4 3TF49
8 3TA28 8 3TF5200*
12 3TB56 12 3TF5600*
* Hoisting duty contactors, designed specially for hoisting duty.
For inching application (AC4 duty)
Discontinued contactor New contactor
Size Type 3TA Size Type 3TF
1 3TA21 1 3TF32
1 3TA11 1 3TF33
2 3TA22 2 3TF34
2 3TA13 2 3TF35
4 3TA24 4 3TF48
4 3TA16 6 3TF50
8 3TA28 8 3TF52
12 3TB56 12 3TF56
Adaptor plate for replacing 3TA
Adaptor plates, to replace Type
3TA61-0A by 3TH80/82-0A 3TX6 406-0A
3TA67/21 by 3TH80/823TA67/21 by 3TF30/31 & 3TX21 43 1YA03TA21/11 by 3TF32/33
3TA22/13 by 3TF32/33/44/45 3TX22 42 1YA0
3TA24 by 3TF46/47/477 3TX24 46 1YA0
3TA24/16 by 3TF48/49 3TX16 48 1YA0
3TA16 by 3TF50/51 3TX16 50 1YA0
3TA28 by 3TF50/51 3TX28 50 1YA0
3TA28 to 3TF52/53 3TX28 52 1YA0
25
Contactors for Hoisting Duty
AC slipring motors are most commonly used for the hoisting applications. AC2 duty pertains to starting
and switching off the slipring motors. In case of hoisting duty breaking current is the starting current
and frequency of switching is high.
The table shows the making and breaking capacity at normal andat hoisting application where Ie indicates the rated full loadcurrent.
Making Breaking
During Normal operation at full load 2.5 * Ie Ie
Hoisting application at full load 2.5 * Ie 2.5 * Ie
During Normal operation at less than 2.5 * Ie Less than Iepartial load
Application
AC-2 operation is the typical duty for starting and switching offfully-loaded slipring motors in the starting phase. The rating ofthe contactor, to switch the motors, is selected primarily on thebasis of rated make & break capacity and desired electricalendurance.
Standard
The contactors comply with the Regulations to low voltageswitchgear of DIN VDE 0660 and IS/IEC 60947-4-1.
Range
Hoisting duty contactors are available from 110A to 400A(AC2/AC3 rating).
Benefits and features
Long life
Hoisting Duty Contactors are provided with new design ofcontacts (AgSnO2 instead of AgCdO) resulting in highelectrical and mechanical life.
They are electrically superior in taking care of excessive stressescoming on contactors during their operations in craneapplications.
Reliability
The Hoisting Duty Contactors have vacuum impregnated coilswhich are suitable for high frequency switching and highvibrations. This helps in reducing coil failures.
Side mounted auxiliary contact blocks are screw mounted andnot snap fitted to withstand vibrations and high frequencyoperation.
Operator safety
Arc Chamber InterlockIt prevents the contactor from switching ON, if the arc chamberis not fitted properly. Thus avoids accidents to plant andpersonnel.
Finger touch proof terminalsIt protects against accidental contact with live parts whichensures operator safety.
High performance
No duration upto 55CContactors are suitable for operation in service temperatureupto 55C without derating. This avoids selection of higherrated contactor, thereby reducing cost.
Selection and ordering data
Hoisting duty contactors For high switching frequency / inching applications with ACcoils, 2NO+2NC aux. contacts
Contactor Rated current Ie (A)Type
Std. pkg.size AC2/AC3 at 415V (nos.)
6 110 3TF50 00-0A..
8 170 3TF52 00-0A..1
10 250 3TF54 00-0A..
12 400 3TF56 00-0A..
Coil voltages:
Coil voltage - 50Hz 110V 230V 415V
Code F0 P0 R0
(Other coil voltages are also available)
26
Technical Information
A. Recommended selection of contactors for hoisting duty
In hoisting operation, slipring motors are generally used. For this typical hoisting duty, we recommend the contactors listed in thefollowing table.
Contactor Stator Protection Rotor Protection Max rotorType Maximum load current with hoisting motor. Maximum load current with hoisting motor(Delta circuit). standstill
For intermittent duty S3 For intermittent duty S3 voltage
25% 40% 60% 100% 25% 40% 60% 100%
3TF50 00 0A 100 88 78 65 150 130 115 95 1000
3TF52 00 0A 145 130 115 95 220 195 170 150 1000
3TF54 00 0A 225 200 180 160 340 300 270 240 1000
3TF56 00 0A 355 325 290 250 530 490 435 375 1000
When 3 conducting paths are connected in parallel, the maximum load current rises to 2.5 times the value given in this table. When 2 conducting paths areconnected in parallel, it rises to 1.8 times the value given in this table.
B. Selection of contactors for contact endurance: with normaland inching operation
Contactors suffer more erosion during inching operation thanwhen stopping motors from a steady speed, i.e. normaloperation. With slipring motors the starting current can be up to2.5 times the rated current of the motor which means that thiscurrent has to be broken when inching is taking place. Duringnormal operation, on the other hand, only the rated current has tobe broken under full-load; under part-load it is even less.Determining contact endurance from AC-2 duty (Ic = 2.5 x Ie) willonly give correct results when 100% inching operation isinvolved.
Max. permissible current Contact life when Contactorand attainable contact breaking the stator Typeendurance when braking contactor load currentsstarting current given for S3-100% duty,below PF 0.4 (2.5 x Ie) Ic = Ie, no inching
A Operating cycles A Approx.Approx. Operating cycles
275 280,000 65 3,500,000 3TF5000425 250,000 95 3,100,000 3TF5200625 250,000 160 2,700,000 3TF5400
1000 150,000 250 2,500,000 3TF5600
The maximum permitted current (e.g. locked-rotor current of motor) must notexceed the values given in the Max. starting current and attainable contactendurance column. The values cannot be increased by paralleling poleassemblies.
C. Selection of contactors for contact endurance: with mixedoperation
When mixed operation is involved, i.e. primarily breaking of themotor rated current but with some breaking of higher currentsdue to inching, the endurance of the contacts can be calculatedapproximately from the following equation:
Where
X = Contact endurance with mixed operation cycles.
A = Contact endurance with normal operation (Ia = Ie) inoperating cycles, from Fig. 1.
B = Contact endurance with inching operation(Ia = Multiple of Ie) in operating cycles, from Fig. 2,Breaking current Ia/AC-2 = 2.5xIe.
C = Proportion of inching in total operating Cycles in %.
Fig. 1 Contact endurance of 3TF contactors as a function of breaking current when switching resistive and inductive AC loads.
27
Fig. 2 Contact endurance for mixed operation as a function of motor ratedcurrent. Motor on rated load, inching at 2.5 times motor rated current(slipring motor).
The contact endurance as a function of the motor rated currentwith mixed operation can be determined from Fig. 2 forproportions of inching of 0, 10, 20, 50 and 100%. The valuesobtained are only applicable if rated motor load is usedcontinuously. In practice therefore, the contact endurance shouldbe greater.
Example 1
Motor rated current 150A. Selected contactor: 3TF5600
Contact endurance in operating cycles at 400V With inching of
0% 10% 20% 50% 100%
5.4 x 106 4.6 x 106 3.9 x 106 2.3 x 106 1.4 x 106
Example 2
Maximum permitted motor rated current for a contact enduranceof 2,000,000 operating cycles at 400V.
Stator Permitted rated current of slipring motorcontactor with inching
Type 10% 20% 50% 100%approx. approx. approx. approx.A A A A
3TF50 00 75 68 48 33
3TF52 00 110 95 66 48
3TF54 00 175 160 125 80
3TF56 00 240 230 160 120
D. NOMOGREM
Apart from knowing the figure for contact endurance in operating cycles, users are also interested to know what period of time thisamounts to before the contacts have to be changed. The value can be ascertained from the nomogram in Fig. 3. using the Nomogram
Fig. 3 Nomogram for determining contact endurance in year (250 working days) and months with daily operating hours of 4, 8, 12, 16, 20 and 24 h.
28
Draw a line from the point on the left-hand scale indicating therequired number of operating cycles to the point on the righthand scale indicating the required number of operating cycles perhour. Then, from the point where this line intersects with thecentre axis, draw a horizontal line to the left or right scale for theactual number of daily operating hours.
Note: If a figure of 365 days per annum is being employed insteadof 250, the total operating time obtained from the nomogrammust be multiplied by 0.68.
Example:
Service requirements: 1.4 million operating cycles endurance,200 operating cycles per hour, 16 hours service per day.
Result:
Total operating time approx =18 months.
Accessories and ordering data:
AC Coils:
Spare coils for Type1) Std. pkg. (nos.)
3TF50 00 0A.. 3TY7 503-0A ..0-0H
3TF52 00 0A.. 3TY7 523-0A ..0-0H1
3TF54 00 0A.. 3TY7 543-0A ..0-0H
3TF56 00 0A.. 3TY7 563-0A ..0-0H
1) Coil voltage code AC 50Hz:
Coil voltage 110 230 415
Code F0 P0 R0
(Other coil voltages are also available)
Spares and ordering data
Contact kits:
Spare contact kit for Type Std. pkg. (nos.)
3TF50 00 0A.. 3TY7 500-0ZA
3TF52 00 0A.. 3TY7 520-0ZA1
3TF54 00 0A.. 3TY7 540-0ZA
3TF56 00 0A.. 3TY7 560-0ZA
Dimensional drawing
The Hoisting Duty Contactors are mechanically similar to ourexisting 3TF power contactors. Therefore they have exactly samedimensions as the corresponding 3TF power contactors.
Please refer page nos. 21 and 22.
Useful technical information
Starting method of Slip ring motor (AC2 duty):
Three types of the contactors are used to control the threephase slip-ring motors: the stator contactor, the accelerationcontactor and the rotor short circuit contactor.
Stator contactor
Initially the stator contactor (K1) is closed to energize the motor.None of the rotor contactor (K2 or K3) is closed yet. Hence all theresistances are present in the rotor circuit. The starting currentcan reach to 1.5 to 4 times of the rated operational current. TheAC2 rating of the stator contactor is selected as per the load factorof the motor.
Load factor =on time *100
Cycle time (on time + rest time)
Acceleration contactor
Now acceleration contactor (K2) is closed which short circuits theresistances (R1). The sizing of this contactor (K2) is as per AC1rated operational current. The current flow time per cycle and thenumber of cycles per hour has to be considered for the selection.
Rotor short circuit contactor
At the end, the rotor short circuit contactor (K3) closes, shortcircuiting the last resistance bank (R2) thus remove all theresistances from the rotor circuit. The starting period is hencecompleted. The duty of this contactors is characterized by thesmall closing stress. the decisive factor is the thermal stress. Theduty factor is considered while finding out the permissible valuesof the rated operational rotor current for rotor contactors.
Picture below shows the acceleration (K2) and the rotor shortcircuiting contactor (K3) in the delta connection. If they areconnected in star then the ratings are reduced by 35%.
29
AC1 Duty Contactors 3TK5
When contactors are not required to make or break current but only carry the current, the contactorscan be used to its full AC1 rating. Siemens 3TK5 AC1 duty contactors can be offered in such cases.
Application
3TK5 AC1 duty contactors are widely used in sugar mills, DCdrives and changeover applications. Also they can be offered forthe applications like switching resistive loads, battery charging etcwhere the AC1 rating of the contactor is suitable.
Standards
3TK5 contactors conform to IS/IEC 60947-4-1. They also carry theCE mark.
Range
3TK5 AC1 duty air break contactors are available from 190A (AC1)to 500A (AC1) in 3 pole version.
Benefits and features
High performance
No duration upto 55CSICOP contactors are suitable for operation in servicetemperature upto 55C without derating. This avoids selectionof higher rated contactor, thereby reducing cost.
Long LifeSuperior design of current carrying parts, contact system andthe magnet system increases the reliability results into higherelectrical and mechanical endurance.
High reliability
High insulation voltage and impulse withstand voltage capacityensures reliable performance during occasional abnormalincrease in supply voltage.
User friendliness and safety
Arc Chamber InterlockIt prevents the contactor from switching ON, if the arc chamberis not fitted properly. Thus avoids accidents to plant andpersonnel
Positively driven contacts3TF contactors satisfy the conditions for positively drivenoperation between the main power contacts and the NCcontacts. NC contacts positively open before the main contactcloses. This is extremely important when power contactors areused in safety circuits of critical applications.
Selection and ordering data
Contactor sizeRated current Ie (A)
Type1)Std. pkg.
AC1 at 415V (nos.)
6 190 3TK50 02-0A..
8 315 3TK52 02-0A..
10 380 3TK54 02-0A..1
12 500 3TK56 02-0A..
1) Coil voltage code AC 50Hz:
Coil voltage 110 230 415
Code F0 P0 R0
30
Technical data
Contactor Type 3TK50 3TK52 3TK54 3TK56
Mechanical Endurance (make/break operations) Oprns 10 million
Electrical Endurance in acc. with ACI duty at Ie Oprns 0.5 million(make/break operations)
Rated insulation voltage Ui V 1000
Permissible ambient temperature storage C -55 to +80service C -25 to +55
Rated impulse withstand voltage Uimp KV 8
Rating of contactors for AC loads
AC-1 duty, switching resistive load
Raed operational current le 40 deg C upto 690V A 200 340 400 53055 deg C upto 690V A 190 315 380 500
Rating of three-phase loadsp.f = 1 at 55 deg C 415V kW 125 207 250 329
500V kW 164 272 329 433690V kW 217 360 434 571
AC-2 and AC-3 duty
Rated operational current le upto 690V A 85 105 138 170
Maximum rating of slipring or squirrel cagemotors at 50/60Hz 415V kW 45 55 75 90
500V kW 59 72 98 118690V kW 78 96 130 156
Thermal loading 10 s current A 990 1450 1725 2300Power loss per current path at le/AC3 W 13 19 30 38
Switching frequency z(contactors without overload relay) No load AC 1/hr 5000 5000 3000 3000
at AC1 1/hr 650 650 650 650at AC3 1/hr 1000 1000 1000 1000
Coil ratingsAC operation 50Hz closing VA 550 910 1430 2450
p.f 0.45 0.38 0.34 0.21closed VA 39 58 84 115
P.f 0.24 0.26 0.24 0.33
Coil voltage tolerances 0.8 to 1.1 x Us
Operating times at 1.0 X UsAC operation closing time ms 22 to 37 25 to 40 25 to 40 25 to 40
opening time ms 8 to 30 10 to 30 10 to 30 8 to 20
Short circuit protection of contactors
Main circuit Co-ordinationType 1 A 315 355 500 800Type2 A 250 350 500 500
31
Accessories and ordering data:
Auxiliary contact blocks:
For Contactor Description TypeStd. pkg.
(nos.)
3TK5 Second 1NO+1NC Left 3TY7 561-1K1
Second 1NO+1NC Right 3TY7 561-1L
Coils:
For Contactor Type * Std. pkg. (nos.)
3TK50 3TY7 503-0A..
3TK52 3TY7 523-0A..1
3TK54 3TY7 543-0A..
3TK56 3TY7 563-0A..
*Please fill in coil codes from table below
Coil voltage code AC 50Hz:
Coil voltage 110 230 415
Code F0 P0 R0
Spares and ordering data
Contact kits:
Spare contact kit for Type Std.pkg. (nos.)
3TK50 02-0A.. 3TY7 500-0KA
3TK52 02-0A.. 3TY7 520-0KA1
3TK54 02-0A.. 3TY7 540-0KA
3TK56 02-0A.. 3TY7 560-0KA
Dimensional drawing
The 3TK5 AC1 duty Contactors are mechanically similar to ourexisting 3TF5 power contactors. Therefore they have exactly samedimensions as the corresponding 3TF power contactors. 3TK50,3TK52, 3TK54 and 3TK56 are having exactly same dimensions asthose of 3TF50, 3TF52, 3TF54 and 3TF56 respectively.
Please refer page nos. 21 and 22.
32
33
Bimetal Overload Relays 3UA and 3UC
The 3UA / 3UC thermal overload relays are suitable for customers from all industries, who want
guaranteed optimum inverse time delayed protection of their electrical loads. The relays meet the
requirements of IS/IEC 60947-4-1.
Application
3UA overload relay: 3UA5/6 are 3 pole adjustable bi-metaloverload relays mainly suitable for normal starting applications.They provide accurate and reliable protection to motors againstoverload as per CLASS 10A. They also offer protection againstsingle phasing and unbalanced voltages.
3UC overload relay: 3UC5/6 are 3 pole adjustable, saturable CToperated bi-metal overload relays mainly suitable for heavystarting applications (i.e. when heavy masses are to be put inmotion resulting in larger starting period). They provide accurateand reliable protection to motors against overload as per CLASS30. They also offer protection against single phasing andunbalanced voltages.
If single-phase AC or DC loads are to be protected by the 3UA /3UC thermal overload relays, all three bimetal strips must beheated. For this purpose, all main current paths of the relay mustbe connected in series.
Standards
Bimetal relays conform to IS/IEC 60947-4-1. They also carry the CEmark.
Range
3UA5: 0.1 to 120A, (Class 10A, without CT)
3UA6: 85 to 630A, (Class 10A, CT operated)
3UC5/6: 2.4 to 400A (Class 30, CT operated)
Relay overview
Overload relay operates on the bi-metallic principle. The heaterwinding wound on the bimetal strips carry the current flowingthrough the motor. In case of overload, the current carriedthrough the heater winding is more than the rated current. Thisheats up the bimetals. Due to this bi-metal strips bend and openthe NC contact of the relay, which is connected in the controlcircuit of the contactor, thus disconnects the motor from thesupply. The tripping time is inversely proportional to the currentflowing through the bi-metal strips. Bi-relays are therefore,referred to as current dependent and inverse-time delayedrelays.
1. Connection for mounting onto contactors:Optimally adapted in electrical, mechanical and design termsto the contactors, these connecting pins can be used for directmounting of the overload relays. Stand-alone installation ispossible as an alternative (in some cases in conjunction with astand-alone installation module).
2. Selector switch for manual/automatic RESET (blue):With this switch you can choose between manual andautomatic RESET. A device set to manual RESET can be resetlocally by pressing the RESET button. A remote RESET ispossible using the RESET modules (accessories), which areindependent of size.
3. TEST button (red):Trip circuit can be manually checked by using this button.During this simulation the NC contact (95-96) is opened andthe NO contact (97-98) is closed. This tests whether theauxiliary circuit has been correctly connected to the overloadrelay. The relay must be reset with the RESET button if it hasbeen set to manual RESET. If the thermal overload relay hasbeen set to automatic RESET, then the overload relay isautomatically reset when the TEST button is released.
4. Motor current setting dial:Setting the device to the rated motor current is easy with thelarge rotary knob. (Recessed dial, hence no possibility ofaccidently change in current setting.)
5. Trip indicator (Green):A separate mechanical Green Trip Indicator is provided on thefront cover of the relay to indicate the tripped state of themanual reset relay.
1
2
53
4
34
Recovery time
After tripping due to overload, the thermal overload relays requiresome time until the bimetal strips have cooled down. The devicecan only be reset after the bimetal strips have cooled down. Thistime (recovery time) depends on the tripping characteristics andstrength of the tripping current. The recovery time allows the loadto cool down after tripping due to overload.
Benefits and features
High performance
In-built single phasing protection
In case of phase loss the current through the other twowindings increases by 1.732 times the rated current of themotor. The current now flows only through the 2 bimetallicstrips which should produce the required force on the trippingmechanism. This needs higher currents for longer time. Ascurrent is not too high so the relay might take higher time totrip. This can cause damage to the motor. Similar conditionhappens in case of phase unbalance. To take care of theseconditions our birelays are constructed such that they offer abuilt-in single phasing protection using differential sliderprinciple.
Temperature compensationThe temperature compensation feature reduces the effect ofthe ambient temperature on the tripping behavior. This ensuresthe minimum tripping current lies within the specified range
for -25 to 55 C. For this purpose the relays are temperaturecompensated between service temperatures of -25 C to+55 C.
User friendliness and safety
SIGUT termination Technique
Shrouded auxiliary terminalsIncreases safety, as they protect against accidental contactwith live parts.
Funnel shaped cable entriesReduce wiring time by facilitating quick location of theconnecting wire.
Cable end-stopThey decide the insertion depth of the connective wire. Asthe wire cannot now protrude into the relay housing, it doesnot hamper the movement of the auxiliary contacts. Sincethe insertion depth is predetermined, insulation of the cablecan be cut accordingly and the possibility of insulationgetting inadvertently caught under the terminal, is avoided.
Captive ScrewsThis feature prevents the screws from falling down therebyfacilitates the wiring. Hence, the relays are delivered withuntightened terminals. This eliminates the operation ofuntightening terminals before wiring.
Lug less terminationThis feature helps in reducing the termination time.
Screw-driver guides reduce wiring time as they allow theuse of power screw-drivers.
Flexibility
Potential free Auxiliary ContactsPotential free 1NO + 1NC contact arrangement is provided as astandard feature. The 1NC contact is used in the control circuitof the contactor for disconnecting the motor in case ofoverload, whereas the 1NO contact can be used for variousapplications such as indication.
Mounting
3UA5: suitable for direct mounting or independent mounting(with the help of independent mounting accessory)
3UA6 and 3UC5/6: suitable for Independent mounting.
35
Selection and ordering data:
Setting range Type reference Backup Mounting Std.HRC fuse pkg. 3NA (nos.)
(A) A (max)
3UA58 30
70 - 95 3UA58 30-5B 160 With85 - 105 3UA58 30-5C 160 Contactor 195 - 120 3UA58 30-5D 200 3TF50
3UA62 30
85 - 135 3UA62 30-5A 224115 - 180 3UA62 30-5B 250160 - 250 3UA62 30-5C 400 Independent 1200 - 320 3UA62 30-5D 400250 - 400 3UA62 30-5E 500
3UA68 30
320 - 500 3UA68 30-5F 500 Independent 1400 - 630 3UA68 30-5G 630
Long Motor Starting time (Heavy duty)
3UC50 30
2.5 - 4 3UC50 30-5E 164 - 6.3 3UC50 30-5G 25
Independent 16.3 - 10 3UC50 30-5J 258 - 12.5 3UC50 30-5K 32
3UC58 30
10 - 16 3UC58 30-5A 3216 - 25 3UC58 30-5C 63 Independent 125 - 40 3UC58 30-5E 10040 - 63 3UC58 30-5G 125
3UC62 30
63 - 100 3UC62 30-5J 250Independent 1
100 - 160 3UC62 30-5A 315
3UC66 30
125 - 200 3UC66 30-5B 500160 - 250 3UC66 30-5C 630 Independent 1250 - 400 3UC66 30-5E 630
Setting range Type reference Backup Mounting Std.HRC fuse pkg. 3NA (nos.)
(A) A (max)
Normal Motor Starting time
3UA50
0.1 - 0.16 3UA50 00-0A 20.16 - 0.25 3UA50 00-0C 20.25 - 0.4 3UA50 00-0E 2
0.4 - 0.63 3UA50 00-0G 20.63 - 1 3UA50 00-0J 20.8 - 1.25 3UA50 00-0K 4
1 - 1.60 3UA50 00-1A 6 With1.25 - 2 3UA50 00-1B 6 Contactor 11.6 - 2.5 3UA50 00-1C 6 3TF30/312 - 3.2 3UA50 00-1D 10
2.5 - 4 3UA50 00-1E 103.2 - 5 3UA50 00-1F 164 - 6.3 3UA50 00-1G 16
5 - 8 3UA50 00-1H 206.3 - 10 3UA50 00-1J 258 - 12.5 3UA50 00-1K 25
10 - 14.5 3UA50 00-2S 25
3UA52
1 - 1.6 3UA52 00-1A 61.25 - 2 3UA52 00-1B 61.6 - 2.5 3UA52 00-1C 6
2 - 3.2 3UA52 00-1D 102.5 - 4 3UA52 00-1E 103.2 - 5 3UA52 00-1F 16 With
4 - 6.3 3UA52 00-1G 16 Contactor 1
5 - 8 3UA52 00-1H 20 3TF32/33
6.3 - 10 3UA52 00-1J 25
8 - 12.5 3UA52 00-1K 2510 - 16 3UA52 00-2A 3212.5 - 20 3UA52 00-2B 5016 - 25 3UA52 00-2C 50
3UA55
10 - 16 3UA55 00-2A 3212.5 - 20 3UA55 00-2B 5016 - 25 3UA55 00-2C 50
With20 - 32 3UA55 00-2D 80 Contactor 125 - 36 3UA55 00-2Q 80 3TF34/3532 - 40 3UA55 00-2R 8036 - 45 3UA55 00-8M 80
3UA58
16 - 25 3UA58 00-2CZ1 5020 - 32 3UA58 00-2DZ1 6325 - 40 3UA58 00-2EZ1 80 With32 - 50 3UA58 00-2FZ1 100 Contactor40 - 57 3UA58 00-2TZ1 100 3TF4650 - 63 3UA58 00-2PZ1 125 3TF4757 - 70 3UA58 00-2VZ1 125 3TF4863 - 80 3UA58 00-2UZ1 160 3TF4970 - 95 3UA58 00-8YZ1 160 1
16 - 25 3UA58 00-2CZ2 5020 - 32 3UA58 00-2DZ2 6325 - 40 3UA58 00-2EZ2 80 With32 - 50 3UA58 00-2FZ2 100 Contactor40 - 57 3UA58 00-2TZ2 100 3TF47 750 - 63 3UA58 00-2PZ2 12557 - 70 3UA58 00-2VZ2 12563 - 80 3UA58 00-2UZ2 160
36
Technical Data
Type 3UA50 3UA52 3UA55 3UA58 3UA5830 3UA6230 3UA6830 3UC5030 3UC5830 3UC6230 3UC6630
Trip class 10A 30
Phase failure 9 9 9 9 9 9 9 9 9 9 9protection
Changeover to 9 9 9 9 9 9 9 9 9 9 9auto-reset at site
RESET button 9 9 9 9 9 9 9 9 9 9 9(trip-free) Blue
Ambient 9 9 9 9 9 9 9 9 9 9 9temperaturecompensation
Trip indicator Green 9 9 9 9 9 9 9 9 9 9 9TEST button Red 9 9 9 9 9 9 9 9 9 9 9Terminal for 9 9 9 X X X X X X X Xcontactor coil
Permissible service 25C to +55Ctemperature
Mounting Contactor/ Contactor/ Contactor/ Contactor/ Contactor/ Independent3TF30/31 3TF32/33 3TF34/35 3TF46 to 3TF50
49
Main Circuit
Rated current (Max) A 14.5 25 45 95 120 400 630 12.5 63 160 400
Rated insulation V 690 690 690 1000 1000 1000 1000 1000 1000 1000 1000voltage Ui(Pollution degree 3)
Rated impulse kV 6 6 6 8 8 8 8 8 8 8 8withstand Uimp
Heating Direct Direct Direct Direct Direct Indirect Indirect Indirect Indirect Indirect Indirect
Conductor cross-section
Solid or stranded sqmm 2.5 to 6 2.5 to 6 1.5 to 25 2.5 to 35 35 to 70 50 to 120/ 2 x 240 1 to 4 240*
Finely stranded sqmm 1.5 to 4 1.5 to 4 1 to 16 1.5 to 25 1 to 2.5 35 120 240with end sleeve
Multi-conductors sqmm 50 to 120/ 2 x 240 with cable lugs 240*
Flats sqmm 1 x 20 x 3 2 x 30 x 5 1 x 15 x 3 1 x 20 x 5 2 x 30 x 52 x 3- x 5*
Terminal screw M4 M4 M5 M5 M8 M10 M10 M4 M6 M8 M10
Power loss per pole(max)
Minimum setting W(VA) 0.9 0.9 1.2 2.6 2.8 5 6(9) 2.5 2.5 3.5 5.5
Maximum setting W(VA) 2.25 2.25 3 4 4 7 15(22) 6.5 6.5 9 14
Auxiliary Circuit (application for all types)
Auxiliary contacts 1NO + 1NC (Potential free)
Rated thermal A 6current Ith
Short circuit A 6 (HRC Fuse type 3NA7)protection (max)
Switching AC15 V 24 60 125 230 415 500
capacity A 2 1.5 1.25 1.15 1 1
DC13 V 24 60 110 220
A 1 0.4 0.22 0.1
Conductorcross-section
Solid or stranded sqmm 2 x (1 to 2.5)
Finely started sqmm 2 x (0.75 to 1.5)with end sleeve
Terminal screw M3.5
* For relay above 180 A
37
Characteristic Curves
For normal operation, all 3 bimetallic strips of the overload relaymust be heated. The overload relays 3UA / C are suitable forprotecting motors with phase control. For protecting single-phaseor DC-loads, therefore, all three main conducting paths must beconnected in series. Tripping curve for 3 pole loads is thenapplicable. The release current with a 3-pole symmetrical load isbetween 105 % and 120 % of the set current.
Tripping characteristics
The current/time curves show the relationship between thetripping time from cold state and multiples of the set current Ie.When the relay is at operating temperature and carrying 100 % Ie,the tripping times are reduced to approximately 25 %. Trippingcurve is applicable to 3-pole loads and 2-pole loads. For single-pole loads, the tripping curves lie between curves of 3-pole loadsand 2-pole loads.
The above curves are the general characteristics curves; for individual characteristics curves of each rating, please contact our nearestsales office.
38
Accessories and ordering data
1. Adaptor: To convert contactor mounting relay to independentmounting, (Fig. 1) suitable for screw type mounting and 35mm DIN rail mounting.
2. Protective cover*: To avoid tampering of the setting, automanual mode or test button. (Fig. 2)
3. Reset cord*: To reset the relay in switchboard with doorclosed. (Length: 600 mm) (Fig. 3)
4. Reset plunger with funnel*: Instead of reset cord for resettingthe relay in switchboard with door closed. (Fig. 4)
Fig. 2: Protective cover
Fig. 3: Reset cord with holder
Fig. 4: Reset plunger + Funnel
Description Type reference Relay type Std. pkg.(nos.)
Reset Plunger 3UX1 011 3UA5/6, 3UC5/610
Funnel 3UX1 013
Reset cord with 3UX1 016 3UA5/6, 3UC5/65Holder (600mm)
Protection Cover 3UX1 111 - 1YA 3UA5/6103UX1 110 - 1YA 3UA58/5830
Adaptor to 3UX1 418 3UA50convert to 3UX1 420 3UA52independent 3UX1 425 3UA55 1mounting 3UX1 421 3UA58
3UX1 421 - 0XA 3UA5830
Set of terminals to 3UX58 11 3UA5800-2 or toconvert relay type 3UA5800-2 Z2 to
3UA5800-2 Z1
3UX58 12 3UA5800-2 Z1 or3UA5800-2 Z2 to 103UA5800-2
3UX58 13 3UA5800-2 or3UA5800-2 Z1 to3UA5800-2 Z2
Fig. 1: Relay with adaptor for independent mounting
* Only one accessory at the time
Fig. 1: Adaptor
39
Dimensional Drawing
3UA50 with independent Mounting Adapter Type 3UX1 418
** Dimension for the square OFF-button (stroke 3mm)
Dimension for the round RESET-button (stroke 2.5mm) less 2.5mm
1) For 35mm standard (DIN) mounting rail
3UA50 mounted on 3TF30/31
Auxiliary Contact a b c d
1NO or 1NC 125 85 108 55
1NO + 1NC or 130 100 100 602NO + 2NC
2) Minimum clearance from earthed element 10mm
40
3UA52/55 with independent mounting
** Dimension For square OFF button (Stroke 3mm)
For Round RESET button (Stroke 2.5mm) less 2.5 mm
1) Suitable for DIN RAIL 35mm as per DIN EN 50022
3UA52 mounted on 3TF 32/33
* Minimum clearance from the earthed components
** Dimension For square OFF button (Stroke 3mm)
For Round RESET button (Stroke 2.5mm) less 2.5mm
Type Dim
a b
3UA52 + 3UX1420 M4 14.3
3UA55 + 3UX1425 M5 18.2
41
3UA55 mounted on 3TF 34/35
* Minimum clearance from the earthed components
** Dimension For square OFF button (Stroke 3mm)
For round RESET button (Stroke 2.5mm) less 2.5mm
1) Suitable for DIN RAIL 35mm as per DIN 50022
3UA58 with independentmounting adaptor type 3UX1 421
* Minimum clearance from the earthed components
** Dimension For square OFF button (Stroke 3mm)
For round RESET button(Stroke 2.5mm) less 2.5mm
1) Suitable for DIN RAIL 35mm as per DIN 50022
3UA5800 mounted on 3TF46/473UA5800_.. Z1 mounted on 3TF48/49
* Dimension For square OFF button (Stroke 3mm)
For round RESET button (Stroke = 2.5mm) less 2.5mm
1) Minimum clearance from insulated components : 3mm
Minimum clearance from earthed components: 10mm
3UA58+ a1 a2 a3 b1 b2 b3 c1 d1 d2 d3 e1 e2 f1 f2 f3 g g1 g2
3TF46/47 90 113 70 117 175 100 123 8 25 25 94 34 80 63 122 28 4.8 6.1
3TF48/49 100 123 80 133 194 110 140 10.5 25 26.5 116 31.5 89 71 132 39 5.5 6.1
42
3UA5800_.. Z2 mounted on 3TF47 7
* Dimension For square OFF button (Stroke 3mm)
For round RESET button (Stroke = 2.5mm) less 2.5mm
1) Minimum clearance from insulated components : 3mm
Minimum clearance from earthed components: 10mm
3UA5830 with individualmounting adaptor type 3UX1 421 - OXA
* Dimension For square OFF button (Stroke 3mm)
For round RESET button(Stroke 2.5mm) less 2.5mm
1) Suitable for DIN RAIL 35mm as per DIN 50022
3UA5830 mounting on 3TF50
* Dimension For square OFF button (Stroke 3mm)
For round RESET button(Stroke 2.5mm) less 2.5mm
1) Minimum clearance from insulated components : 3mm
Minimum clearance from earthed components: 10mm
43
3UA6230 CT Operated Birelay
** Dimension For square OFF button (Stroke 3mm)
For round RESET button (Stroke 2.5mm) less 2.5mm
** Dimension For TEST button (Stroke 3mm)
For Round RESET button (Stroke 2.5mm) less 2.5mm
2) Suitable for DIN RAIL 75mm as per DIN EN 50023
3UA68 CT Operated Birelay
44
3UC50 CT Operated Birelay
** Dimension For Square OFF button (Stroke 3mm)
For Round RESET button (Stroke 2.5mm) less 2.5mm
2) Suitable for DIN RAIL 75mm as per DIN EN 50023
3UC5830/3UC6230/3UC6630 CT Operated Birelay
** Dimension For TEST button (Stroke 3mm)
For Round RESET button(Stroke 2.5mm) less 2.5mm
2) Suitable for DIN RAIL 75mm as per DIN EN 50023
Relay Type A B C D E F
3UC58 30 46 135 69 6.6 150 15x3
3UC62 30 46 140 69 9 160 20x3
3UC66 30-5B (200A) 50 146 69 9 160 20x3
3UC66 30-5C-5E(400A) 50 146 70 11 171 25x4
45
Motor Protection Circuit Breakers3VU13 and 3VU16
3VU13/3VU16 is suitable for use in fuseless motor feeders upto 11KW/22KW (25A/63A) respectively. 3VU
motor protection circuit breakers are used for protection of motor against overload, single phasing and
short-circuit faults.
Applications
Motor Protection
Circuit breakers type 3VU13 & 3VU16 offer overload, shortcircuit and phase loss protection for 3 phase motors upto 11kWand 22 kW respectively. The breaker has a toggle switch forease of operation and can be offered with auxiliary contacts,trip indicating contacts, U/V or Shunt release. High breakingcapacity of 100kA is available in 3VU13 upto 6A and in 3VU16upto 25A.
Distribution Feeder Protection
Standard version of 3VU13 and 3VU16 has adjustable O/L andfixed S/C release. Main application is for disconnection andprotection of the distribution feeders, upto 25A and 63Arespectively. A large number of overlapping ranges areavailable for offering closer protection to various loads.
Transformer protection
A separate 3VU13 range can be offered to protect the primaryside of the transformers. The range is available upto 20A. Totake care of the inrush current due to transformer switching,the S/C release is set at 19 times the rated current unlike 12times of the rated current available in standard range.
Fuse Monitoring
3VU1340-1MS00 is offered for Fuse Monitoring application.This device is connected in parallel to the fuses. In case one ofthe fuses blows, the rated current will flow through thecorresponding phase of this MPCB. MPCB, through its auxiliarycontacts, provides a tripping signal to the contactor and thusthe motor will be switched off. Hence, the motor will beprotected from single phasing. (Refer page 51 for connectiondiagram)
Standard
3VU motor protection circuit breakers confirm to IS/IEC 60947-1,IS/IEC 60947-2, IS/IEC 60947-4-1, DIN VDE 0660
Range
3VU13: 0.16 - 25A
3VU16: 10 - 63A
Benefits and features
High performance
Instantaneous Tripping3VU circuit breakers operate on the Current LimitingPrinciple.
Current Limiting PrincipleIn case of short-circuit condition motor protection circuitbreaker trips before the short-circuit current reaches theprospective peak. Hence, for circuit breaker to be currentlimiting it must interrupt the short-circuit current in half cycleor less as shown below.
3VU13/16
Fuse Monitoring MPCB - 3VU1340-1MS00
46
3VU13 Circuit - breakers with 1NO+1NC auxiliary contacts forline-side protection of transformers with high inrush current
Rated Overload Shortcircuit Type Std.Current release release pkg.
In range setting (nos.)A A A
0.6 0.4-0.6 12 3VU1340-1TE00
1 0.6-1 15 3VU1340-1TF00
1.6 1-1.6 29 3VU1340-1TG00
2.4 1.6-2.4 48 3VU1340-1TH00
4 2.4-4 72 3VU1340-1TJ00 1
6 4-6 120 3VU1340-1TK00
10 6-10 190 3VU1340-1TL00
16 10-16 300 3VU1340-1TM00
20 14-20 300 3VU1340-1TN00
Fuse monitoring motor protection circuit - breakers with1NO+1NC auxiliary contacts
Rated Overload Shortcircuit Type Std.Current release release pkg.
In range setting (nos.)A A A
0.2 0.2 1.2 3VU1340-1MS00 1
3VU16 Circuit - breakers with 1NO+1NC auxiliary contacts formotor and plant protection
Rated Overload Shortcircuit Type$ Recommended Std.Current release release 415V Motor pkg.
In range setting Rating in (nos.)A A A Kw/HP (DOL)
10 6-10 120 3VU1640-1ML00 4/5.4
16 10-16 190 3VU1640-1MM00 7.5/10
25 16-25 300 3VU1640-1MN00 11/15 1
32 22-32 380 3VU1640-1MP00 15/20
40 28-40 480 3VU1640-1MQ00 18.5/25
52 36-52 600 3VU1640-1MR00 22/30
3VU16 Circuit - breakers for plant protection
Rated Overload Shortcircuit Type$ Std.Current release release pkg.
In range setting (nos.)A A A
63 45-63 600 3VU1640-1LS00 1
$ The 3VU13 and 3VU16 circuit breakers are also available without auxiliarycontacts. To order the same, the 8th place of the type number is to be replacedwith the digit 0.
Current Limiting is achieved in 3VU as followsIn case of a short circuit, the contacts are opened electro-dynamically by the short circuit current. The instantaneousovercurrent release, through the switching mechanism, trips allthe three poles of the breaker. A large arc voltage is quicklybuilt up in the arc chamber limiting the short circuit current.Thus ensures faster fault clearing.
Ambient temperature compensation upto 55oC hence noderation required upto 55oC.
Safety
Trip Free MechanismThe breakers have a trip-free mechanism. Even by holding thetoggle, tripping operation can not be stopped or blocked onceit is started. Thus ensure positive opening in the event of fault.
Positive ON/OFF indication through toggle switch
Compact and space saving
User friendliness and safety
SIGUT connection technique ensures ease of wiring (canobviate use of lug)
Fingers touch proof terminals ensures operator safety
Separate trip indication on short circuit and overload faultusing alarm contact
Flexibility
Can be used as a main and EMERGENCY STOP switch.
Identical accessories reduce stock levels
Selection and ordering data
3VU13 Circuit - breakers with 1NO+1NC auxiliary contacts formotor and plant protection
Rated Overload Shortcircuit Type$ Recommended Std.Current release release 415V Motor pkg.
In range setting Rating in (nos.)A A A Kw/HP (DOL)
0.16 0.1 - 0.16 1.9 3VU1340-1MB00
0.24 0.16 - 0.24 2.9 3VU1340-IMC00
0.4 0.24-0.4 4.8 3VU1340-1MD00
0.6 0.4-0.6 7.2 3VU1340-1ME00
1 0.6-1 12 3VU1340-1MF00 0.25/0.33
1.6 1-1.6 19 3VU1340-1MG00 0.37/0.5
2.4 1.6-2.4 29 3VU1340-1MH00 0.75/1
3.2 2-3.2 38 3VU1340-1NH00 1.1/1.5
4 2.4-4 48 3VU1340-1MJ00 1.5/2 1
5 3.2-5 60 3VU1340-1NJ00 2.2/3
6 4-6 72 3VU1340-1MK00 3/4
8 5-8 96 3VU1340-1NK00 3.7/5
10 6-10 120 3VU1340-1ML00 4/5.4
13 8-13 156 3VU1340-1NL00 5.5/7.5
16 10-16 190 3VU1340-1MM00 7.5/10
20 14-20 240 3VU1340-1MN00 9.3/12.5
25 18-25 300 3VU1340-1MP00 11/15
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Technical Data
According to DIN VDE 0660; IS/IEC 60947-1; IS/IEC 60947-2; IS/IEC 60947-4-1
Type 3VU13 3VU16
Number of poles 3 3
Max. rated current In
motor protection A 25 52
distribution A 25 63
Permissible ambient temperature
at full rated current C -20 ... +55
in storage C -50 ... +80
Rated operational voltage Ue V 690
Rated frequency Hz 50/60
Rated insulation voltage Ui V 750
Rated impulse withstand voltage Uimp kV 6
Utilization category
to IS/IEC 60947-2 (motor starter protection) A
to IS/IEC 60947-4-1 (motor starters) AC-3
Mechanical endurance Operating cycles
up to 25 A 1/h 100,000 100,000
25 A upwards 1/h 30,000
Number of operating cycles/h (on load) 1/h 25 25
Degree of protectionwith open terminals/with conductors connected IP00/IP20
Temperature compensation to IS/IEC 60947-4-1 Yes
Phase failure sensitivity to IS/IEC 60947-4-1 Yes
Auxiliary contact for 3VU13 and 3VU16
Rated operational voltage Ue AC V 230 400 500
Rated operational current Ie A 3 1.5 1.2
Utilization category AC-15
Rated operational voltage Ue DC L/R 200 ms DC V 24 60 220
Rated operational current Ie A 2.3 0.7 0.3
Utilization category DC-13
Wattloss Per Breaker
Current Watt Current Wattrating rating
0.6 5 2.4 8
4 6 6 7
6 7 25 14
25 9 63 23
Cross-section for main conductors
Solid or stranded mm2 2 x (1 ... 6) 1 x 1.5 ... 2 x 16or 1 x 25 + 1 x 10
Finely stranded with end sleeve mm2 2 x (1 ... 4) 1 x 1.5 ... 2 x 10or 1 x 16 + 1 x 10
Cross-sections for auxiliary and control connecting leads
Solid or stranded mm2 1 x 0.5 ... 2 x 2.5
Finely stranded with end sleeve mm2 1 x 0.5 ... 2 x 2.5
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Technical data for accessories:
3VU13 3VU16
Undervoltage Release
Consumption During Pick-up VA/W 10/6
Consumption During Running VA/W 4.7/2
Dropout V 0.7 to 0.35 X Ue
Pickup V 85 to 110% of Ue
Max Operating Time ms 20
Shunt Release
Consumption VA/W 10/6
Max Continuous Rating Sec 5
Pickup V 0.7 to 1.1 X Ue
Current Limiter for 3VU13
Rated current In 56 Amps
Rated Voltage Ue 500 V, 50 / 60 Hz.
Power Connection mm2 2 x (1 to 6)
Mounting
on DIN Rail in any position.
Table 1 3VU13/3VU16 breaking capacity at 415V
3VU13
Rated current A 0.16-1 1.6 2.4 3.2-4 5-6 8-10 13-16 20-25
Rated Short circuit breaking capacity @ 415V
Icu kA 100 100 100 100 100 10(50) 6(50) 6(50)
Ics kA 100 100 100 100 100 10(50) 6(50) 6(50)
Maximun back up fuse (gL/gG)
Diazed A * * * * * 80 80 80
NH A * * * * * 80 80 80
( ) Values in bracket are with current limiter; * Fuse not required
For 3VU13 breakers of ratings 8A & above, in place of fuses, the Current Limiter can be used to increase the S/C breaking capacity.
Rated Breaking Capacity DC; t = 15ms
1 Contact 2 Contacts 3 Contactsin series in series 10 kA
110-150V 220-300V 330-450V
3VU16
Rated current A 1.6-2.4 4 6 10 16 25 32-63
Rated Short circuit breaking capacity @ 415V
Icu kA 100 100 100 100 100 100 35
Ics kA 100 100 100 100 100 50 17
Maximun back up fuse (gL/gG); * Fuse not required
Diazed A * * * * * * -
NH A * * * * * * 200
Rated Breaking Capacity DC; t = 15ms, upon enquiry
49
Characteristic Curves
Times set current
Time current characteristics of 3VU13
Times set current
Time current characteristics of 3VU16
Short circuit current Ik (effective)
Cut off characteristics of 3VU1300-0MK00
Short circuit current Ik (effective)
Cut off characteristics of 3VU1600-0MN00
50
Accessories:
RHS Alarm contact When short circuit (and not overload) occurs, alarm contact 1NO+1NC changes over which can be used to give(1NO + 1NC) indication. We need to reset it manually after clearing of short circuit. It performs a function of reclosing lockout.
and/or
Auxiliary Contact This contact can be added to the MPCB with or without built -in 1NO+1NC contact.(1NO + 1NC)
LHS Shunt Release Shunt trip is used for remotely tripping the MPCB.
or
Undervoltage Release It trips the MPCB on voltage interruption, preventing the undesirable restart of the motor.
On Top Current Limiting For increasing breaking capacity of 3VU13 to 50kA for 8 - 25A(applicable Moduleto 3VU13 only) (independent
mounting)
51
Current-Limiter
The breaking capacity of 3VU13 is 100kA upto 6A. However for3VU circuit breakers with rated current of 8A and 10A the short-circuit breaking capacity is 10kA. For circuit breakers with ratedcurrent from 16A to 25A the short-circuit breaking capacity is 6kA.In order to enhance the breaking capacity to 50kA, for theseratings (8A to 25A), the current limiter can be used. Thus theneed of back up fuses is obviated.
The current limiter is connected in series with 3VU13 MPCB.
When a short circuit occurs, the limiter trips and in turn opens thedownstream MPCB. The auxiliary contacts of the current limiter(1NO+1NC) can be used for signaling whether the limiter hastripped or not.
Several MPCBs can also be connected at the output of a currentlimiter. However the summation of current ratings of individualMPCBs should not be greater than 56A.
Connection diagrams
a) Shunt releaseb) Under voltage releasec) Integral auxiliary contactsd) Additional auxiliary contact for separate mountinge) Short circuit signaling contactf) Auxiliary contact of current limiter
Diagram for 3VU13/16 and current limiter (applies for 3VU13 only)
Fuse Monitor 3VU1300-IMS00
Shunt release
Wiring diagram for Shunt releasefor 3VU13/16
Wiring diagram for under voltagerelease of 3VU13/16
52
Accessories and ordering data
3VU9131-3AA0Add on Auxiliary block1NO + NC
3VU9131-7AA00S/C Trip indicating contacts1NO + 1NC
3VU9132-0AB15220/230V 50HzUnder Voltage release
3VU9132-0AB55, 220/230V 50Hz 3VU9132-0AB50, 24V/50Hz 3VU9132-0AB73, DC 110-240VShunt release
3VU9168-0KA00Padlocking for ToggleHandle 3VU13/16
Also available
3VU9135-1AB033 Busbar for 3 breakers
3VU9135-1AB043 Busbar for 4 Breakers
3 Insulated Bus-bar System for 3VU13
3VU9135-1AB023 Busbars for 2 BreakersMax. 63Amps
3VU9135-1AB053 Busbar for 5 BreakersMax 63 Amps
Door operating mechanism for 3VU13/16*
Breaker Operator Kit for 3VU13 - 3VU9133Breaker Operator Kit for 3VU16 - 3VU9163
1. Handle with masking frame
2. Gasket
3. Door
4. Fixing screws
5. Drive coupling
6. Extension shaft - 300 mm
7. Adapter
8. Breaker operator
* For complete assembly, please order both front drive and breaker operator kit.
8UC61 3VU9133/63
3RV19 25-5AB3 feed-in Terminal, max rating63A, for bus-bar system
Note: All the above accesories have standard package no. = 1
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Dimensional Drawings
3VU13 circuit-breakers and accessories
3VU13 circuit-breakerscan be combined witha) undervoltage or shunt release and/orb) short-circuit signalling switch and/orc) auxiliary contacts
3VU9 1382AB00 limiterThe limiter has the same dimensions as thestandard version of the 3VU13 circuit-breaker
3VU9 1351AB02, 3VU9 1351AB03,3VU9 1351AB04, 3VU9 1351AB05three-phase busbar
c For 2 devices: 3VU9 1351AB02d For 3 devices: 3VU9 1351AB03e For 4 devices: 3VU9 1351AB04f For 5 devices: 3VU9 1351AB05
3VU16 circuit-breakerscan be combined witha) undervoltage or shunt release and/orb) short-circuit signalling switch and/orc) auxiliary contacts
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Door operating mechanism with extension shaft (300mm) with door interlock & padlocking facilities.
Mounting bracket of 3VU 13/163VU9133-1PA01 for 3VU 133VU9163-1PA02 for 3VU 16
(Figures in bracket are for 3VU 16)Mounting bracket
Handle
Required space above arc chutes for 3VU13 and 3VU16
Minimum clearance to adjacent parts as well as non-insulated live parts.
3VU13 3VU16
55
Starters
Overview
Siemens cat